Zadhan said: During the days of his illness, Ibn Abbas (may Allah be pleased with them both) gathered his sons and said: I heard the Messenger of Allah (peace and blessings be upon him) say: "Whoever performs Hajj from Makkah on foot and returns, for every step he will receive seven hundred good deeds, and every good deed is equal to the good deeds of the Haram." It was asked: How much is a good deed of the Haram? He said: "One good deed is equal to one hundred thousand good deeds."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب النذور / 20107